Construction of geo-ontology knowledge base about spatial relations

Several approaches are proposed for retrieving images. Each of them describes image according to application domain requirements. No global approach exists to resolve retrieving image in complex domains (as medical one), in which content is multifaceted. A framework to retrieve medical images is presented. In this paper, we expose our three-dimensional approach applied to medical domain, and required elements for both knowledge base and retrieval process. The proposed approach, built on multifaceted aspect, offers all possibilities to describe image within multifaceted content (context, physical and semantic). Conceptual relations are presented for designing knowledge base for coherent and efficient indexing and retrieval processes. Required spatial relations of processes are also exposed.

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Query Answering With Non-Monotonic Rules: A Case Study of Archaeology Qualitative Spatial Reasoning

10.29007/6ph5 ◽

2019 ◽

Author(s):

Mohamed Ben Ellefi ◽

Pierre Drap ◽

Laurent Garcia ◽

Fabien Garreau ◽

Claire Lefèvre ◽

...

Keyword(s):

Cultural Heritage ◽

Knowledge Base ◽

Spatial Reasoning ◽

Answer Set Programming ◽

Spatial Relations ◽

Knowledge Bases ◽

Query Answering ◽

Qualitative Spatial Reasoning ◽

Large Dataset

This paper deals with querying ontology-based knowledge bases equipped with non-monotonic rules through a case study within the framework of Cultural Heritage. It focuses on 3D underwater surveys on the Xlendi wreck which is represented by an OWL2 knowledge base with a large dataset. The paper aims at improving the interactions between the archaeologists and the knowledge base providing new queries that involve non-monotonic rules in order to perform qualitative spatial reasoning. To this end, the knowledge base initially represented in OWL2-QL is translated into an equivalent Answer Set Programming (ASP) program and is enriched with a set of non-monotonic ASP rules suitable to express default and exceptions. An ASP query answering approach is proposed and implemented. Furthermore due to the increased expressiveness of non-monotonic rules it provides spatial reasoning and spatial relations between artifacts query answering which is not possible with query answering languages such as SPARQL and SQWRL.

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Improved preservation of the otolithic membranes

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100128857 ◽

1987 ◽

Vol 45 ◽

pp. 914-915

Author(s):

G. M. Cohen ◽

J. S. Grasso ◽

M. L. Domeier ◽

P. T. Mangonon

Keyword(s):

Toluidine Blue ◽

Potassium Phosphate ◽

Vestibular Function ◽

Spatial Relations ◽

White Leghorn ◽

Supporting Cells ◽

Semithin Sections ◽

Micromechanical Models ◽

Soluble Components

Any explanation of vestibular micromechanics must include the roles of the otolithic and cupular membranes. However, micromechanical models of vestibular function have been hampered by unresolved questions about the microarchitectures of these membranes and their connections to stereocilia and supporting cells. Otolithic membranes are notoriously difficult to preserve because of severe shrinkage and loss of soluble components. We have empirically developed fixation procedures that reduce shrinkage artifacts and more accurately depict the spatial relations between the otolithic membranes and the ciliary bundles and supporting cells.We used White Leghorn chicks, ranging in age from newly hatched to one week. The inner ears were fixed for 3-24 h in 1.5-1.75% glutaraldehyde in 150 mM KCl, buffered with potassium phosphate, pH 7.3; when postfixed, it was for 30 min in 1% OsO4 alone or mixed with 1% K4Fe(CN)6. The otolithic organs (saccule, utricle, lagenar macula) were embedded in Araldite 502. Semithin sections (1 μ) were stained with toluidine blue.

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